Driving mechanism for grinding-machines.



" @CWWM c. H. NORTON. DRIVING MECHANISM FOR GRINDING MACHINES.

-APPLICATION FILED JULY 22. I9H.

- 1,161,957, Patented Nov. 30, 1915.

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C. H. NORTON.

nmvme MECHANISM FOR GRINDlNG MACHINES.

APPLICATION FILED JULY 22, IBM

1,1 61 ,957. Patented Nov. 30, 1915.

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APPLICATION FILED IULY 22, I914.

Patented Nov. 30, 1915.

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c. H. NORTON. DRIVING MECHANISM FOR GRINDING MACHINES. APPLICATION FILED JULY 22.1914.-

1,161,957. I Patented Nov. 30, 1915.

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7 CHARLES H. NORTON, OF WORCESTER, MASSACHUSETTR' ASSIGN OR' TO NORTON GRINDING- COMPANY, OF

SSACHUSETTS.

Specification of Letters Patent.

woncnsrnn, MAssAoHUsEr'rs,aoonroimrrolv or DRIVING 'mncnnnism' FOR- GnINpiNG-MAcmivns.

Patented Nov. 30, 1915.

Or'iginal'applieationfiled June 6, 1913, Serial No. 772,055. Divided and this application filed July 22, 1914.

To all concern;

P e itkn'own' that I, CHARLES H. NORTON, a'crtlzerii of the United states, residing at Worcester, 'in the county of W'orcester and V grinding machine, filedJune 6,1913, Serial: .No. 772,055. I

State of vMassachusetts, have invented anew and useful Dr1ving Mechanism. forGrind- .ing-Machine's,-of} which the following is a specification. a

This invention relates to a machine for grinding surfaces of rotation, especially cylindrical siirfaceS,.and,contains matter divided out of my application on -a cylindrical The principal objects of the invention are to provide a machine ofthis character of a simple construction in comparison with the kind; of vork thatit' accomplishes and ca-- pable of-beinggfullygcontrolled and manipulated byfian operator in-a comparatively simpleisavayathe machine being. self-com,

tained not }.only vwith respect to the power shaftbut. alsoiwithrespect to the tight and Iligurel isa front elevation of a machine loose pulleyg -so' that no overhead counter,

speed changing device, and to a novel of connecting the power shaft with thework drive head.

a: :The: invention also involves improvements in combinations and parts and details of construction as will appear hereinafter.

Reference :is to be-had to the accompany ing drawings,.in which. 1

constructd; in accordance with this invention; Fig. 2" 'isfanend elevation thereof;

Fig. 8 isan elevation of the otherend; and

Fig. 4 is a rear-view.

The mach'ne is: shown as comprising main casting or based on wh p tes sliding' table Bi mounted in longitudi f thefibrise, There isf features relate to an improvedi quicklyto shift a belt upon a pair of Serial No. 852,389.

wheel slide C operating "in transverse ways toward and from the sliding table which is des gned to support the'work.

The machine receives its power from a maindrivingbelt 8 (Figs. Q'and 4), passing around a pairgfof tlghtandloose pulleys 9 on the main sliaft; -1QWhlCl1 is carriedon the rear of the mach ne. A shipper handle 11 onthe front of the machine is mounted on a horizontally extending rod 11 to the rear end of which'is' secured the belt shifter 12. .On the main shaft 10 there is mounted a pulley 13 which, by'means of a belt 14 and a pulley 14 is effective to rotate a cone pulley 15 supported on a'stud in-one end of a lever 15 pivoted at its other end to the base A; A second cone pulley 15 is mount- .ed ona shaft 16 supported in fixed bearings on the base A and driven from the cone pulley 15'by means of a belt- 15 A belt shifting device of special construction is provided for moving the belt 15"- from step to step upon the'cones. This device comprises a sliding block 500 adapted to be moved longitudinally upon a rail 501 by means of a handle 502. The block is secured in adjusted positionfby a spring latch avhich may be released by the latch handle 503. A horizontally extending support 50% (Fig. 3) is bolted to the block 500 and has pivoted thereto a pair" of belt shifting guides 505 and 506. The lower guide 505 is pivotally mounted upon a stud 507 secured to the "t'ppor't 504 and is normally pressed against 'stop1 508 by aspiral spring 509 concentric with the stud 507. i'a rly mounted upon a stud 510 and'is pro vided with a stopv and spring corresponding to the stop 508 and the spring 509 but so ar ranged that the guide506 will normally be moved in. a direction opposite to the m 0vement of the guide 505. The yielding arms herein described are sorarran'ged that the guides will positively move the belt toward proacliiiig 'side. By-this'device I amen-- os'ition 'until it has been shifted anthem.

need not be herein described in detail.

cone pulleys Without manualmanipulation of the belt. The lower cone pulley 15 is mounted upon a stud in the end of a pivoted arm 15 and is thus enabled to yield upwardly as the belt is being shifted from stepto step. i

The shaft 16 is suitably connected by .de-

vices, not shown in this application, to move the work table Blongitudinally. The mechanism by which this movement is accomplished is fully hown in the parent application, to which reference is made for a full description. The hand-wheel 28 constitutes means for moving the table B manually.

As is well understood, the sliding table B carries the work, which is to be fed forward and back, and which is also rotated on its own axis. For this purpose the table is provided with a head-stock S5 and a tail-stock 86 s'imilarto those in use on lathes, which The work is rotated by means of bevel gears 98 (Fig 4.) connected with the shaft 10 by the clutch '37, and operating a telescopic shaft 99 connected by spiral gears 100 (Fig. 2) with a shaft 101. From this latter shaft a belt drives a cone pulley 102 (Fig. 4) and a belt from this pulley drives a pulley 103 (Fig. 2) on the work spindle 10st.

For the purpose of rotating the grinding wheel, the shaft 10 is provided with a pulley 118 (Fig. 1) which, through 'a belt 119 passing over an idler and tightener 120,

- operates a shaft 121.

stitutes means for rotating the wheel shaft 1326 and the grinding wheel E. A tightener pulley 124 is pressed upon the belt 123 by a weight 125 for which a tension spring may be substituted if desired.

The several driving and driven pulleys upon the main power shaft together with the gears and clutches mounted thereon are entirely inclosed within the base or within guard plates and casings fixed. to the base.

,1- have thus provided an improved and simplified driving mechanism for a grindmachine, in the use of which a single operator has full and convenient control of the machine.

Although I have illustrated and described only a single embodiment of the invention, I am' aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention asv expressed in the claims. Therefore I do not wish to be limited in these respects, but What I do claim is p i 1. A grinding machine having in combination a base, 'a grinding wheel and shaft tight and loose pulleys on said shaft, a belt ling said belt, and connections from ,said

shipper extending through the base to an operating handle on the front thereof. 2. A grinding machine having in combination a base, a grinding wheel and shaft supported thereon, and means to drive -aid wheel shaft, said means comprising a power shaft supported'in hearings on said base, a driven pulley on said power shaft for rotating the shaft, a driving pulley on said shaft for driving the wheel shaft, a second driving pulley on said power shaft foifldriving the work table feed, a gear loose on said power shaft for drivingthe mechanism for rotating the work, a clutch on said power shaft for connecting said gear to said power shaft, and coveringplates fixed to said base and inclosing said pulleys and said gear.

3. A grinding machine having in combitudinally movable work table having a ro-- tatable spindle thereon, an intermediate shaft mounted on said table and connected to rotate said spindle by variable speed connections between said intermediate shaft and said spindle, and connections from said power shaft to said intermediate shaft, said last named connections including a telescoping shaft, a pair' of beveled gears for driving said telescoping shaft from said power shaft, and a pair of spiral gears for driving said intermediate shaft'from said tele scoping shaft.

1. A grinding machine having in combinationa base, a grinding wheel and shaft supported thereon, means to drive said wheel shaft including a power .shaft mounted on said base, a work table, a rotatablespindle 011 said table having a pulley secured there 'to. an intermediate shaft mounted on the table and havmg a driving pulley and a conepulley thereon, a belt connecting said driving pulley to the pulley on the spindle, a second intermediate shaft on said table hav ing a cone pulley, and a spiral gear thereon, a belt" connecting said cone pulleys, a second spiral gear meshing with the first named gear and movable longitudinally with said table, and telescoping connections from said second spiral gear to said power shaft.

5. A grinding machine having in combination'a base, a grinding .wheel and shaft supported thereon, means for driving said .wheel shaft, a work table mounted on said base and'longitudinally movable thereon, and means to move said work table, s'aid latter means including a cone pulley supported on a fixed bearing, a second cone pulley supported on a movable bee-ring, a belt connect In testimoiiy whereof I have.he1"e hnto 'seting said pulleys, and devices to shift the my hand, in'the presence of two subscribing belt from one step to moth'er' on said pulwitnesses. I -V v leys, said devices comprising a sliding b1ock,, I CHARLES NORTON.

5 a pair of guides yieldingly mounted thereon, Witnesses: 1

h and a-stop. fol" each guide limiting its move- HOWARD W. DUNBAR,

ment in one direction. G. BELDEN. 

